Unwanted vegetation on the land of electric transforming stations is a problem, in the sense that it contributes to higher fire risks and also constitutes an obstacle for people performing maintenance operations at the station. Such unwanted vegetation is controlled using herbicides and mechanical measures. Since the use of herbicides implies environmental hazards, there is a need to find alternative ways of fighting the unwanted vegetation. Investigation into suitable plants for ground cover, trials in the greenhouse, trials in the field, soil analyses and compilation of experiences from similar trials are parts of this work. The paper also contains analyses of possible environmental benefits and economical gains. There is also a final discussion of some proposals regarding alternative weed controlling methods.

Detta arbete påvisar att en effekthöjning kan åstadkommas på en motor som arbetar enligt Ottoprincipen med bibehållen driftsäkerhet. Slutsatser om motormodifieringar och komponentutbyten drogs efter en detaljerad litteraturstudie, teoretiska beräkningar samt intervjuer med yrkesverksamma inom området.En överladdad 2,5 liters bensinmotor med fem cylindrar av märket Volvo användes som bas för en prototyp.Motorn genomgick en modifiering med komponentbyten och programmering av ECU för att åstadkomma en effekthöjning från 193 till 320 hk med bibehållen driftsäkerhet.Resultaten presenteras med figurer och beräkningar där testresultaten från motorn i original mot modifierat utförande jämförs, därefter följer en diskussionsdel om vad som kunde gjorts för att nå ett bättre resultat..

The outdoor environment is the first thing you notices when you come to a pre-school and it also plays an important part in the development of children, their play and meeting their large motor needs. It is important that the outdoor playground is stimulating and inviting.My goal is to examine if the outdoor environment plays any role in the development of children and their interest in nature. What kind of thoughts do teachers and parents have about outdoor play, and is there a developmental goal for the children as well as what role do the teachers play in reaching these goals. In my work I want to show how an outdoor environment should be formed to help educationally as well as be safe and not least of all fun to be in..

Quadrotor UAVs are self-stabilizing, autonomous flying machines that has recently become more popular than ever. Unmanned Aerial Vehicles have their roots in the military, where they were developed for use in reconnaissance and combat. During the last few years, advances in the fields of electronic sensors, Electric motors and microcontrollers have enabled smaller designs and autonomic flight control even for private use. The quadrotor, which is the particular kind of UAV we are looking closer at in this paper, has 4 rotors in an X-like formation. This configuration has many advantages such as good lift capacity, non-complex mechanical structure and serviceability.In this project we aquired a current overview of the domain and determine whether it is possible to construct a quadrotor UAV designed for use in a WISENET sensor network on a low budget and short time schedule.Based on existing community project AeroQuad, a quadrotor is constructed with a budget of about 500 euro.

AbstractElectricity consumption is a globally increasing problem caused by the high share of electricity produced in coal power plants. These contribute to high carbon emissions when only about 1/3 of the heat generate electricity and the remaining 2/3 of the heat cools off. Combined heat and power plants (CHP) have high efficiency because they use the residual heat for domestic heating. The CHP plant often use fuels from renewable resources, giving them a lower carbon footprint, but are also depending on the heat demand. If electric powered products such as drying cabinets convert to heat powered products more environmentally friendly electricity will be produced by CHP plants, which can supplant electricity, produced from coal power plants and reduce carbon emissions.

An automatic control system for calibration of pressure indicators has been constructed. This control system can be used as a complement to the calibration system located at AerotechTelub, division MainPartner, in Linköping. The calibration system used today contains some not wanted pressure changes, which is compensated by hand today. The new system presented in this report automates the calibrating process and simplifies the calibration. Suitable hardware as motor, controls card and so on have been found and software in the form of Visual Basic program has been developed.

Today the competition in the automobile industry is getting all tougher. The technology behind cars becomes more advanced. To get ahead of competitors car companies has to look into new areas of innovation.One important area is vehicle safety. Bigger companies have come so far in vehicle safety that difference between cars more depends on the car type (size) than the technology behind it.There is one area where vehicle safety that still has great opportunities for improvement, which is in active safety. The term active safety states that the car has the ability to identify treats and automatically respond to the treats.

This report treats whether it is viable to invest in solar heating to heat the therapy pool at Östersunds Rehabcentrum. The rehab center is owned by the county council of Jämtland and is located on Solliden in Östersund city. The solar heating where supposed to be a complement to the district heating that was heating the pool in the current situation. Later, it however showed that this was not the case. The pool is currently being heated by a radiator circuit that is being heated by the district heating.

The automotive market is currently undergoing a historical change where stricter emission legislations and ever increasing fuel costs have intensified the search for effective alternatives to the conventional internal combustion engine, which has resulted in a substantial trend towards electrification of powertrains. Storage of electrical energy is the fundamental component in this technology where the lithium-ion batteries are currently considered as the most appropriate solution. Lithium-ion batteries, however, as other types of batteries, can only be used efficiently and durably within a specific temperature range.This Master thesis has been carried out in collaboration with Electroengine in Sweden AB, situated in Uppsala, which has an ongoing project regarding development of a modular battery system for electric powertrains. The project is at a stage where an initial prototype has been developed which provides the foundation for this thesis. The study has addressed the battery system performance from a thermal perspective, in order to validate the ability of the system to create a thermally serviceable environment for the lithium-ion battery cells.

Shear Strength and Deformation Characteristics of Uppsala Clay with CRS and Standard OedometerTyra Morell Bonin & Magdalena MählerTo see how much a clay compact under different pressure one can use several different methods and in this project, two methods were used, the Standard Oedometer and a CRS apparatus. A Standard Oedometer is a full-time manual device and the CRS apparatus is a modern electric and automatic device. The aim of the project was to see similarities and differences between the two methods and examine which method that were most reliable. This has been done with repeated laboratory tests and afterward evaluations. With this information one can get a picture of how the clay will behave and how it will deform in nature.

De finmotoriska förmågorna är oerhört viktiga vad det gäller den mänskliga läs- och skrivförmågan, då handen behöver vara tränad för att göra små rörelser och ögonen ska kunna följa dessa rörelser. Barn som har svårigheter med de finmotoriska förmågorna blir beroende av andra, då de kan få svårt att klara av vardagliga bestyr så som att klä på sig själva och använda bestick. Något som försvårar arbetet med de finmotoriska förmågorna utomhus är att barn använder vantar stora delar av året och att tillgång till materiel som utmanar handrörelser plockas fram mer sällan under vinterhalvåret på grund av kylan. Detta gör att barn inom I ur och skur-förskolor som oftast är ute får mindre träning av de finmotoriska förmågorna under kalla årstider. Vi har jämfört I ur och skur-förskolor med förskolor utan den inriktningen, vad det gäller arbetet med de finmotoriska förmågorna.

This report is regarding an electrical installation of an alarm system on a post fishingboat called Andromeda. The background of the installation was an earlier andinadequate alarm system that led to a motor failure. The ship was taken out of serviceand was sold to Björn Magndahl who rebuilt it to a yacht.The project was conducted partly by developing the existing systems, partly bydocumenting the work by means of electrical blue prints. Except the alarm systems, aninstallation of the frequency control unit for the bow thruster was installed.The installation was working fine and the outcome of the documentation was handedover in a form of a binder during the test drive of the systems and the assignment wasapproved..

Volvo Personvagnar AB Motor (VCE) är ett bilindustriföretag som ingår i Fordkoncernen. Företaget ligger på ett flertal platser i Sverige, bland annat i Skövde. Vid produktionsenheten i Skövde, som går under namnet SKep är den huvudsakliga sysselsättningen bearbetning och montering av bensin- och dieselmotorer till personbilar. Inom företaget drivs, med hjälp av företagshälsovården, några arbetsmiljöutbildningar för chefer, arbetsledare och skyddsombud. Detta examensarbete kom att beröra arbetsmiljöarbete kopplat till utbildning av chefer och arbetsledare inom detta område.

In Sweden we need more lambs during March to June. I decided to calculate on a spring lamb production, because to many of the Swedish lambs go to slaughter in the autumn. I counted on 1000 ewes which have 2000 lambs each year, 200 of these lambs stays on the farm and replace old ewes. The buildings are 3600 square meters. I have counted on two different sorts of buildings, the first one is a shed, the second one is three polytunnel sheephouses.

The electric vehicle market has potential to contribute to Sweden?s national goal to have a fossil fuel independent transport sector by 2030. However, the market answers to a lot of challenges making it difficult for the market to fully reach its potential. The volume of electric vehicles has seen a steady increase during the last year (2012), although many of these vehicles are mostly for PR purposes or bought by the public sector that wants to lead by example. Still, barriers in the form of high purchase costs, an anxiety for the limited battery capacity and the lack of standardisation are some of the problems that the market is struggling to solve.